CVE-2026-90151
Received
Received - Intake
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Vulnerability report for CVE-2026-90151, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-17
Last updated on: 2026-09-18
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
NFSv4: remove callback IDR entry on client allocation failure
nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it
finishes setting up the client. If any later initialization step fails,
the error path frees the nfs_client directly with nfs_free_client(). That
bypasses nfs_put_client(), which is where the callback IDR entry is
removed during normal teardown.
A failed allocation can therefore leave cb_ident_idr pointing at a freed
nfs_client. A later NFSv4.0 callback lookup by cb_ident would find the
stale pointer and take a reference to it.
Make the callback IDR removal helper callable by the allocation failure
path, and remove the callback identifier before freeing the client.
This was found by a local static-analysis checker for publish-before-free
lifetime bugs and confirmed by manual inspection.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | f4eecd5da3422e82e88e36c33cbd2595eebcacb1 |
| Linux | Linux | 2.6.38 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
